Here is an informative overview of the series and the context of that specific era.
First airing in 1967, Professor Balthazar represents the pinnacle of the "Zagreb School of Animated Films." Unlike the high-octane slapstick of American cartoons like Tom and Jerry , Balthazar was defined by its psychedelic art style , gentle pacing, and a vibrant, watercolor palette. The show’s protagonist is a benevolent, elderly inventor who lives in "Balthazartown," a place where the laws of physics are secondary to the needs of its quirky citizens. Professor Baltazar S02 E12.avi
The Magic of the Machine: An Analysis of Professor Balthazar Here is an informative overview of the series